Stamp-mill



{No Model.) '2 Sheets-Sheet l.

H. BURSON.

STAMP MILL.

No. 532,023. f Patented Jan. 8, 1895.

(No Model) 2 Sheets-Sheet 2.

H. BURSON.

STAMP MILL.

No. 532,023. Patented Jan. 8, 1895.

UNITED STATES HARVEY @PATENT @einen VARE, OF ARKANSAS ClTY, KANSAS.

STAM P-MILL.

SPECIFICATION forming part of Letters Patent No. 532,023, dated January 8, 1895.

Application liled July 3l, 1894, Serial No. 519,124. (No model.)

To all whom t .may concern:

Be it known th at l, HARVEY BURSON, a citizen of the United States of America, residing at TWichita, in the county of Sedgwick and State of Kansas, have invented certain new and useful Improvements in Stamp-Mills, of which the following isa specification, reference being had therein to the accompanying drawings and theletters of reference thereon, forming a part of this specification, in which*- Figure 1 isa side elevation of the mill; Fig. 2, a horizontal-section of Figi, on line l-l; Fig. 3, a detailed view of one of the sprocket wheels, and a portion of the drive chain-belt thereof, for rotating the mill stamp, and a cross-section of the shaft upon which said wheel is placed. Fig. fi, is a rear elevation of the mill; Fig. 5, a front elevation of the same; Fig. G, adetailed sectional view of one of the stirrups of the mill for lifting the stamps; Fig. 7, a central longitudinal section of one of the stamps of the mill, and Fig. 8, a detailed perspective of the detachable foot, or end section, of one of said stamps.

This invention relates to certain improvements in stamp mills, of that class adapted for crushing and pulverizing ores, and consists in certain novel construction and arrangement of the parts for lifting the mill stamps, and for rotating the said stamps; which improvements are fully set forth and explained in the following specification, and pointed out in the claims.

The object of this invention is, to provide mechanism whereby heavy stamps may be alternately lifted and permitted to drop, by means of a comparatively light continuously applied rotary power, and whereby, through the agency of the same applied power, the stamps are continuously rotated; thereby crushing the ore by causing the stamps to drop upon it, and pulverizing the ore by means of rotating the stamps as they rest upon its crushed particles.

Referring to the drawings, the frame of the mill, which is preferably of wood, comprises the sills F2, the corner posts F and F', the plate beams F framed into posts F and upon posts F', the front erossbeams T and T', the

5o rear cross-beam F" and the top cross-beam ll; the corner posts l" being extended above the plate beams F, and braced as shown at F3 in Fig. l. Also between posts Fis a crossbeam Q, and resting upon and fixed to said posts is a plate beam Q,aud in the space between said posts is a pair of vertical posts f andf framed at each end, respectively, in to beams Q and Q.

S is a cross-snai t boxed at C and C to posts F, a distance above the plane of beams F, and fixed thereon respectively between posts F andf the cams R and R, and between posts f,f, a bevel gear wheel G, and is further provided with a belt pulley B, fixed on one end thereof, which is adapted to have a belt passed about it to drive shaft S; but however said pulley may be substituted by a crank wheel, for driving said shaft by hand power.

S is a vertical shaft boxed to the frame at its upper end, as shown at a, and stepped in a box ct at its lower end; which box is supported by means of beam F", and is provided with a bevel gear wheel G fixed on its upper end and arranged in mesh with said gear G. Said shaft also has fixed on it, a little distance above its lower end, a pair of sprocket wheels W and W.

.l and J are a pair of housings fixed upon beam H, and fulcrumed in each said housing by means of a cross-bolt, or pin, (Z is a lever D, which levers, each, terminate at their rear end, under cams R, with forks, in which is jourualed a friction sheave wheel V, and pivotally connected with the forward end portion, of each said lever, is a stirrup I comprising two side parts held from spreading apart, beyond a given distance, by means of a crossbolt Zfand carrying at its lower portion a plate L made with a central opening. (See Fig. 6.)

A and A are the stamps of the mill, each being made with a socket in the lower end, and each being provided with a bottom end section A made with an extension A fitted into said socket (see Fig. 7) where it is held by means of a cross-key c placed through a cross-hole of the stamp portion A and a hole e of said section A', which end sections A are intended to be made of, what is termed, white iron, to thereby increase their wearing qualities. Fixed in the upper end of each said stamp, by means of a cross-key g, is an upreturned portion, as shown in Fig. 1, thereby forming a recess between the two portionsy through which the shafts S" are placed, and feathered on said shafts, respectively, in said bearing recesses, are sprocketwheels N V13 the said rshafts S/ being grooved: longitudi` nally as represented at Wzto accommodate a spline of Wheels WV', W', respectively. (See Fig. 5.) f

E and E are sprocket chains, or chain belts, placed one about each wheel W of shaft S' and from thence respectively about wheels XV', W', of shafts S" S", as shown in Fig. 2.

N is the stamp box of themill into which the stamps drop, and operate, and into which the ore, tobe operated upon, is Vplaeed,and M is a screen railing erected about the sides of said box. It being customary to place Water with the ore being crushed and pulverized in order that it may be pulped and removed by the overflow of Water when reduced toa pulp and mingled with the water, and as the descending, or dropping of the stamp causes the water to splash, the saidscreen becomes nec essary to prevent coarse particles of ore from being ejected from the said stamp box,but permits the Watercharged With the pulped ore, to pass off through the screen meshes, and when such overflow, or discharge, takes place it'is caught in a surrounding trough N' of box N which conducts it to a general discharge therefrom, and about the said surrounding trough is erected a sheet iron inclosing case P which converges above the screen railing M and extends up and incloses stamps A so that the splash caused by the drop of said stamps will not reach beyond said trough, which inclosing case is made in separable partssnitably held together and suitably fastened down upon the margin of said trough, and is also provided at one side with a chute P', leading to Within the case, through which the ore to be crushed and pulverized is entered.

In operation ore and water are continuously supplied to Within the stamp box, and the shaft S is driven which likewise operates cams R and R, and through the agency of gears G and G' drives shaft S' with its sprocket wheels W, W, Which through the agency of the chain belts E and E and the feathered Wheels W', W', drives the stamp shafts S"- S- and thereby rotates the stamps of the mill. Also as the cams R and R rotate they alternately engage the friction sheave wheels V, V, of levers D, D, and force down that end of said levers thereby raising the mill stamps, and at such time as the said levers are forced down the full limit of their engaging cam the cams terminal ridesoff saidfriction wheels, thus releasing the levers which kpermits the mill stamps to drop, thereby reversing the levers to their former normal position, and as said stamps drop they kcome upon the ore in box N and crush it by the force of the drop, and

While the stamps rest upon the ore, prior to being againraised, their rotary movement upon the ore pulverizes it, and that which becomes pulverized and pulped passes off with the discharge of Water and other ore and water takes its place.

Having thus described my invention, What I` claimasnew, and useful, and desire to se-A cure by Letters Patent, is as follows:

l. The combination with the frame of ythe l shaft S and its bearings; the shaft S' and its bearings; the gears Grand` G' of said, shafts;

the. cams R and' RK fixed upon4 said former shaft; thespro'cketwheels XV, WV, xed upon Asaid latter shaft, the levers D and D ful- .crumedin housings of the framegthe stamps connected with, and adapted to be raised by,

Asaid levers, by the action of said` cams upon said levers, andto drop When said levers are disengaged from said` cams; the sprocket Wheels feathered upon the Y shafts of said stamps; the chain belts E and E placed about said former and latter sprocket Wheels; the

Vstamp box N provided with thesurrounding trough and with the screen-railing; and the inclosing case P provided with the chute P',

substantially as and for the purpose set forth.

2. The combination With the supporting frame and bearings thereof, the horizontal rotary shaft S, the cams R andR fixed on said shaft; the vertical rotary shaft S'; the chain Wheels W, W, fixed on said shaft; the levers D, D fulcrumed in housings of said frame, and provided with friction Wheels adapted to be engaged by said cams; the stamps A, A, provided With the upright shafts S", S", connected with said levers; the chain Wheels feathered ou said shafts; the bracket arms, or bearings, K forpreventing vertical movement of said chain Wheels, the chain beltsE and E placed about said chain wheels for imparting a rotary movement to said stamps; and the means for driving said. shafts, substantially as and for the purpose specified.

3. In the stamp mill described, the combination of the levers D, DK; the cams R, R, for actuating said levers and the shaft for supporting and operating said cams; the stamps A-A and shafts C"-O" thereof; the stirrup links I jointed to and depending from the ends of said levers; the perforated plates L sleeved on the upper end portion of said stamp shaf ts, and jointed to saidstirrup links; and the collars L fixed on the ends of said stamp shaftsA above said plates, substantially as and for the purpose specified.

HARVEY BURSON.

Witnesses:

WM. J. HUToHINs, H. M. PATTERSON.

.IDO 

